Communication system, communication method, and communication program

摘要

Provided is a communication system capable of releasing a tunnel while securing mobility without securing resources in an SGW or the like. A first node provided in a communication system that provides mobility of packet data using tunneling includes: a tunnel control unit that releases a tunnel and deletes tunnel information; and a management unit that associates and manages an IP address allocated to a terminal to which the tunnel is established and subscriber identification information of the terminal when the tunnel is released and the tunnel information is deleted.

主权项

1. A first node provided in a communication system that provides mobility of packet data using tunneling, the first node comprising:
a tunnel control unit that releases a tunnel and deletes tunnel information; a management unit that associates and manages an IP address allocated to a terminal to which the tunnel is established and subscriber identification information of the terminal when the tunnel is released and the tunnel information is deleted; and a reception notification unit that, when there is reception for the terminal after the tunnel established for the terminal is released,
identifies a third node that accommodates the terminal using subscriber identification information associated with an IP address to which a reception packet is addressed, andtransmits a reception notification to the third node.